Measurement and Numerical Simulation of Cylinder Surface Pressure under Different Air Volumes

Abstract

As a classic research topic of fluid mechanics, the research on the problem of flow around a circular cylinder is essential both from the perspective of academic research and application in the engineering industry. In this paper, the surface pressure of the cylinder is measured by the experimental research on the flow around the circular cylinder, the three-dimensional modeling of the key parts of the experiment is carried out according to the one-to-one size, and the three-dimensional CFD software is used to numerically simulate the velocity field and the pressure field. The research shows that under different air volumes, the relative error between the experimental value and the simulated value of the inlet velocity in the convergence section and the working section is less than 5%. It can be considered that the results of the numerical simulation and the experimental results are within the allowable range. The relative error between the experimental value and the simulated value of pressure is less than 2%, and the numerical simulation results are consistent with the experimental results. It lays a theoretical foundation for the improvement of the flow around the cylinder experiment and its engineering application in the future.